172 results about "Free radical oxidation" patented technology

The invention provides a photoelectrical FenDun method for removing the non-degradable organic substance in water, which combines photochemistry reaction and electrical FenDun reaction to co-treat the organic substance effectively with multiple actions. The invention also provides a device applying the photoelectrical FenDUN reaction to remove organic substance in water, which comprises: the reactor employing shape stable electrode (DSA) as anode, employing activated charcoal as cathode, putting the low pressure mercury vapor lamp closed in the quartz glass tube vertically between the anode and cathode and venting a certain quantity of oxygen to the cathode surface, adding marginal ferrous salt into the organic wastewater with pH being about 3 as catalyst and importing current flow for electrolysis to remove pollutant. The invention oxides and degrades organic substance by using the hydroxyl free radical generated by photochemical reaction and electrical FenDun reaction, the hydroxyl free radical possesses strong oxidability which can oxide organic substance without selection, and is characterized by the complete, fast and effective oxidation and no secondary pollution.

The invention discloses a method for synchronous desulfurization and denitrification of marine vessel exhaust, which belongs to the field of the air pollution control and the marine vessel exhaust emission control. In the method, exhaust passes through a spray humidification and cooling zone, an ozone decomposition and free radical oxidation zone and a seawater washing zone in sequence, thereby realizing synchronous desulfurization and denitrification. The spray humidification and cooling zone which consists of a small seawater pump, an exhaust humidification and cooling pipeline and a spray nozzle can humidify and cool the exhaust; the ozone decomposition and free radical oxidation zone which consists of an ozone decomposition and free radical oxidation device, an ultraviolet lamp and an ozone generator can rapidly convert SO2 and NO into hydroxyl acid and nitric acid through hydroxyl and the like; and the seawater washing zone which consists of a seawater washing tower, a filler and a large seawater pump can convert the hydroxyl acid and the nitric acid into sulfate and nitrate and discharge the exhaust and washing water meeting standards. The synchronous desulfurization and denitrification system formed through the invention has the advantages that the size is small, no seawater quality restoration system and raw material storage and transportation are needed, the products can be directly discharged into the sea, and the like.

The invention relates to viral formulations and related pharmaceutical products for use in gene therapy and / or vaccine applications. Especially preferred viral formulations disclosed herein are liquid adenovirus formulations, which show improved stability when stored in about the 2-8° C. range while also being compatible with parenteral administration. These formulations comprise a buffer, a sugar, a salt, a divalent cation, a non-ionic detergent, as well as a free radical scavenger and / or a chelating agent to inhibit free radical oxidation.

The invention discloses a method for the advanced treatment of wastewater. The method comprises the following steps of: 1) filtering off-standard wastewater, delivering the wastewater into a catalytic ozonation tower, and simultaneously adding ozone for contact oxidization reaction; 2) delivering the effluent of the catalytic ozonation tower into an oxidization buffer stabilization basin for stabilization; 3) and after the stabilization, delivering the effluent into a BAF basin for treatment, and delivering discharged water into a clean water basin. The method reduces the addition amount of the ozone, improves the utilization efficiency of the ozone, converts the ozone into hydroxyl radicals by using a metal catalyst, and reduces the activation energy of hydroxyl radical oxidation reaction to promote hardly biodegradable macromolecule organic substances in the wastewater to be oxidized into easily biodegradable micromolecule substances, so that the biochemical limit to refining the wastewater is broken through and the biodegradability of the wastewater is increased; and the water quality of the effluent can meet the provincial standard of Jiangsu province, namely Chemical Industry Main Water Pollutant Discharge Standard, completely by further treatment in the BAF basin.

The invention relates to a blueberry leaves drink with health function based on the blueberry leaves as main material and its making method, wherein the blueberry leaves contents a great amount of flavonoid with more than 40 physiologically activities of reducing blood sugar and blood fat and resisting arrhythmia, the resisting free radical oxidation ability of the blueberry is not compared with the other anti-oxidizing agent, meanwhile there is great amount proanthocyanidins contented in the blueberry with very good health function to the nervous system for children especially for the pregnant woman conspicuously. The making method is characterized by the following: picking the blueberry leaves with more than 90 days growth; using the technique process of washing, immersing, quick freezing, disintegrating, chilling, extracting with vacuum low-temperature, freezing, filtering, allocating, flash sterilizing and germ-free canned. The invention guarantees not to damage the nutrition and effective and active substances in the material almost, which makes the product have certain health function.

The invention provides a 3D NAND flash memory channel hole preparing method and 3D NAND flash memory. The method comprises the steps of conducting deposition in a channel hole of a substrate stackingstructure, and respectively forming a blocking layer, an accumulating layer, and a tunneling layer; conducting deposition of a first polysilicon layer; conducting low-temperature free radical oxidation on the polysilicon layer of the first deposition, and forming a masking oxide layer; conducting etching on the masking oxide layer, the first polysilicon layer, the tunneling layer, the accumulatinglayer and the blocking layer at the bottom part of the channel hole until a silicon epilayer is exposed and over etching is conducted on the silicon epilayer at a certain depth; Removing the maskingoxide layer and conducting pre-cleaning before the deposition of a second polysilicon layer; conducting deposition on the second polysilicon layer. The invention is advantageous in that as the low-temperature free radical oxidation technology is adopted to form the masking oxide layer and diluted hydrofluoric acid is adopted to conduct the pre-cleaning of the second polysilicon layer before deposition, the step of etchback of the polysilicon can be saved, and the channel hole polysilicon layer with good uniformity and high quality can be formed, and cost is low and reliability is high.

The invention discloses a treatment method of complexing nickel wastewater. Compared with the prior art, Fe is loaded on granular active carbon, and a supported Fe2O3.FeO / GAC catalyst is prepared, a heterogeneously activated persulfate system generates sulfate radical free radicals with the strong oxidizing property to oxidize complex form heavy metals in the wastewater, by damaging the stable structure of complexing ions, the heavy metals are freed from complex, and the heavy metals are removed through a simple alkaline chemical precipitation method. The Fe2O3.FeO / GAC activated persulfate coupling system is established, the pH value of the wastewater is adjusted through the actual condition of the wastewater during wastewater treatment, a good treatment effect can be achieved, the catalyst still has good catalytic activity after being reused, and the wastewater treatment cost can be greatly reduced. A large amount of equipment investment and operating cost is not needed, materials are easy to take, and operation is simple. The active carbon carrier can be reused, resource reuse is achieved, and cost is reduced.

The invention discloses a preparation method of a common bombax flower extract with whitening and anti-aging activities. The preparation method is characterized in that dried common bombax flowers are crushed and sieved; the common bombax flower is subjected to ethanol soaking extraction twice; extracted liquids obtained in the two times are combined; reduced-pressure concentration is carried out, such that a suspension liquid is obtained; the suspension liquid is sequentially extracted by using petroleum ether and ethyl acetate; reduced-pressure concentration is carried out, and ethyl acetate is recovered; and a paste is obtained by vacuum drying, such that the common bombax flower extract is obtained. With the method, the prepared common bombax flower extract has anti-free radical oxidation, tyrosinase activity inhibiting, and anti-ultraviolet radiation functions, and can be used in skin whitening and aging-preventing especially photoaging-preventing. The common bombax flower extract can be used as a cosmetic additive or a medicine active component, and can be applied in whitening and anti-aging cosmetics.